These two train cars are part of the Thomas & Friends Wooden Railway collection. The Diesels and Steamies need oil and coal to keep Sodor steaming along. This set includes a Vicarstown Oil Co. car and a Sodor Coal Car with removable coal cargo. Roll the tanker to watch the oil move inside or press the button to watch the tanker light up. Cargo cars can connect to wooden railway cars, engines and vehicles with magnet connectors. They are perfect for expanding Thomas & Friends Wooden Railway train sets. Train cars include two "AG13" (LR44) Batteries. They are made of durable wood and recommended for children ages 2 and up.